ATE403983T1 - SYSTEM AND METHOD FOR INCREASE FORWARD LINK CAPACITY IN A SATELLITE COMMUNICATIONS SYSTEM - Google Patents

SYSTEM AND METHOD FOR INCREASE FORWARD LINK CAPACITY IN A SATELLITE COMMUNICATIONS SYSTEM

Info

Publication number
ATE403983T1
ATE403983T1 AT00978290T AT00978290T ATE403983T1 AT E403983 T1 ATE403983 T1 AT E403983T1 AT 00978290 T AT00978290 T AT 00978290T AT 00978290 T AT00978290 T AT 00978290T AT E403983 T1 ATE403983 T1 AT E403983T1
Authority
AT
Austria
Prior art keywords
satellite
signal
bpsk
user
link
Prior art date
Application number
AT00978290T
Other languages
German (de)
Inventor
Leonard Schiff
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Application granted granted Critical
Publication of ATE403983T1 publication Critical patent/ATE403983T1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/12—Channels characterised by the type of signal the signals being represented by different phase modulations of a single carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A system and method for increasing feeder link capacity in a satellite communication system (100), wherein a gateway (108) communicates with a satellite (102) over a feeder link (112), and wherein the satellite (102) communicates with terrestrial user terminals (106) over a user link (110). A feeder link signal (112) is produced by multiplexing a first BPSK signal and a second BPSK signal (402). The feeder link signal (612) is QPSK modulated, QPSK spread (402). The feeder link signal (612) is transmitted from the gateway (108) to the satellite (102). The satellite (102) demultiplexes the feeder link signal (612), recovering the first and second BPSK signals (702, 704, 706). The first and second BPSK signals are then modulated (502-508)(602-608), to produce a first and second user link signal (832, 834). The user link signals (832, 834) are BPSK modulated, QPSK spread. The user link signals (832,834) are transmitted from the satellite (102) to the user terminals (106).
AT00978290T 1999-10-29 2000-10-27 SYSTEM AND METHOD FOR INCREASE FORWARD LINK CAPACITY IN A SATELLITE COMMUNICATIONS SYSTEM ATE403983T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43068899A 1999-10-29 1999-10-29

Publications (1)

Publication Number Publication Date
ATE403983T1 true ATE403983T1 (en) 2008-08-15

Family

ID=23708601

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00978290T ATE403983T1 (en) 1999-10-29 2000-10-27 SYSTEM AND METHOD FOR INCREASE FORWARD LINK CAPACITY IN A SATELLITE COMMUNICATIONS SYSTEM

Country Status (9)

Country Link
EP (2) EP1230750B1 (en)
CN (2) CN1276594C (en)
AT (1) ATE403983T1 (en)
AU (1) AU1576701A (en)
CA (1) CA2389384A1 (en)
DE (1) DE60039779D1 (en)
ES (1) ES2310525T3 (en)
HK (2) HK1070763A1 (en)
WO (1) WO2001033740A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105680932A (en) * 2016-03-02 2016-06-15 天津凯普卫星导航通信技术有限公司 Satellite mobile message data communication system and communication method
US10484084B2 (en) 2016-05-04 2019-11-19 Hughes Network Systems, Llc Method and system to increase capacity of high throughput satellite communication
CN111147610A (en) * 2020-01-21 2020-05-12 哈工大机器人（岳阳）军民融合研究院 Satellite operation and control center system, server method and satellite system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4901307A (en) 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
JPH0722999A (en) * 1993-06-29 1995-01-24 Sanyo Electric Co Ltd Digitally modulated radio telephone system
JP2863975B2 (en) * 1993-07-16 1999-03-03 松下電器産業株式会社 CDMA transmitting apparatus and receiving apparatus, CDMA transmitting method and CDMA mobile communication system
US5691974A (en) * 1995-01-04 1997-11-25 Qualcomm Incorporated Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy
US5805567A (en) * 1996-09-13 1998-09-08 Lucent Technologies Inc. Orthogonal modulation scheme
US6240142B1 (en) * 1998-01-07 2001-05-29 Qualcomm Incorporated Quadrature modulator and demodulator

Also Published As

Publication number Publication date
EP1230750B1 (en) 2008-08-06
DE60039779D1 (en) 2008-09-18
HK1070763A1 (en) 2005-06-24
EP1230750A1 (en) 2002-08-14
EP1976154A2 (en) 2008-10-01
CA2389384A1 (en) 2001-05-10
CN100344078C (en) 2007-10-17
ES2310525T3 (en) 2009-01-16
WO2001033740A1 (en) 2001-05-10
CN1415142A (en) 2003-04-30
HK1052803B (en) 2007-03-09
CN1564480A (en) 2005-01-12
HK1052803A1 (en) 2003-09-26
AU1576701A (en) 2001-05-14
EP1976154A3 (en) 2010-12-22
CN1276594C (en) 2006-09-20

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties